Well as of today 1 British Pound is $2.069 US dollars.
So a dress that costs 4,200 British Pounds is $8,689.80 US Dollars.
Holy good lord! THat is a lot of money right there.
I’m glad that you had a wonderful birthday, lizardgirl! 
– Mitch
Thanks, Mitch! 
lizardgirl - Sure thing! I’m sorry I missed it. shrinks
– Mitch
Mitch: Hey, you have to admit, better late than never!
The Star Swordsman - Heheh. Yes, that’s certainly true. I should be thankful for that, at least. (snigger)
– Mitch